Kiln.



R.-L. DENNISON.

mum, APPLICATION FILED JULY 2|. 1 913.

1;141,619. Patented June 1, 1915.

2 SHEETS-SHEET 2.

I ,4 TTOR/VE Y,

WITNESSES THE' NORRIS PETERS C0, PHOTOJJTHO, WASHINGTON, D. C.

Bonner IL. DENNISON, on Kansas crrv, arrssouar.

'KILN.

Specification of Letters Patent;

Application filed July 21, 1913. Serial No. 780,261.

To all whom it may concern:

Be it known that 1, ROBERT L. DENNIsoN, a citizen of the United States,residing at Kansas City, in the countyof Jackson and State of Missouri,have invented certain new and. useful Improvements in lxllns, of

' which the following is a specification.

thereof.

My invention relates to improvements in brick kilns, and moreparticularly to means for supplying the furnaces thereof with air, tothe end that economy in the consumption of fuel and more thoroughcombustion of gases arising from such consumption is attained.

In order that the invention may be fully understood, reference will nowbe made to the accompanying drawings, in which:

Figure 1 is a sectional plan view of a kiln embodying the invention.Fig. 2 is a broken vertical section on line 11 of Fig. 1. Fig. 3 is abroken vertical section on line III-III of Fig. 2. Fig. 4 is a detailperspective of an air controlling means constituting a feature of theinvention.

1 designates a kiln having a series of furnaces 2 arranged at eachlongitudinal side Each furnace is divided into a combustion-chamber 3and an ash-pit 4 by a grate 5, of any ordinary or preferred form. Accessis had to the combustionchamber 3 to supply the grates with fuel,through an opening 6 normally closed by a door 7, and access is had tothe ash-pit 4 through an opening 8 normally closed by a close-fittingdoor 9. The combustionchamber 3 communicates withthe interior of thekiln through an opening 10, the lower side of which is formed by abridge-wall 11.

12 designates an air receptacle laid in the bridge-wall 11 during theconstruction of the same, just beneath the grate 5. Said receptacle issubstantially T-shaped in plan view, and has an inlet 13 controlled by avalve 14:, hinged at its upper edge to the receptacle 12. The rear upperportion of the receptacle 12 is provided with a plurality of upwardlyand forwardly inclined nozzles 15, which discharge into a cavity 16 inthe upper forward portion of the bridge-wall .11, see Fig. 1. Cavity 16has a ledge 17 which overlaps the discharge ends of the nozzles 15 andthus excludes dust, cinders, and other foreign matter therefrom.

Valve 14 is controlled by a hinged-rod 18 extending back through thefront wall of the furnace and provided with a handle 19,

so that an operator may control said valve from a point in front of thefurnace. F.0d 18 is of such weight and runs through the front casting 20of the furnace with sufficient friction to maintain the valve 11- eitherItatented June 1, 1915.

completely or partially open, so that the quantity of air entering theinlet 13 may be controlled to a nicety.

21 designates branch ducts extending beneath the furnaces at the sidesof the kiln, as shown on Fig. 1. Each duct 21 communicates with eachfurnace on its respective side of the kiln through a port 22 in a plate23 covering the duct the width of the furnace.

The passage of air through port 22 is controlled by a valve 24,slidablyunounted upon the plate 23 which is held in place by the furnacewalls and has two guides 25 to maintain the valve in proper positionwhen it is slid backward or forward to cover or uncover its respectiveport 22. Valve 24 like the valve 1 1, is controlled from the exterior ofthe furnace by a rod 26 extending through the front wall of the furnaceand provided at its outer end with a handle 27. The branch ducts 21communicate with a main duct 28, which may receive its supply of airfrom any suitable source, such, for instance as a fan or blower. Themain duct 28 is of such cross sectional area and length as to supply aseries of kilns. In order that the flow of air through the branch ductsmay be independently controlled so that each will receive only thedesired amount of air from the main duct 28, I provide said branch ductswith individual valves 29.

In practice, when the furnaces are in operation, they are suppliedentirely with air flowing through the ports 22, which air enters theash-pits and passes upward through the receptacles 12 and the grates 5.Should it be found that air passing through the grates and the burningfuel thereon, fails to result in complete combustion of the carbon andgases arising from such combustion, the valve 14 is opened to allow airto enter the receptacle l2 and be distributed through the nozzles 15 ata point adjacent the bridge-wall 11, where it combines with said gaseswhile the same are in their most highly heated state, and furnishes thenecessary oxygen to insure thorough combustion of said gases and thecarbon mixed therewith. The extent to which each valve let should beopened is readily determined by an experienced operator on looking intothe furnace through the usual peep-holes, to ascertain the condition ofthe fire. Should the source of air supply to the 7 main duct 28 becomedisabled and thus fail 'to provide thefires in the furnaces with thenecessary amount of air to insurev complete 7 preferred form of myinvention, I reserve the right to make such modifications as properlyfall Within the spirit ancl'scopeof the claim.-

Having thus describedmy invention, What I'claim and desireto secure byLetters Patent is A kiln of the class described comprising a furnaceincluding a combustion chamber having a brldge Wall, said bridge Wallhavlnga longitudinal cavlty formedjtherein, an

air receptacle embedded in bridge Wall and disposedbelovv the cavity, aplurality of inclined nozzles le ading from the air receptacle to thebottom of the cavity, the top wall of said cavity being disposeddirectly above the upper open ends of the nozzles, said air receptaclehaving a branch extend ing into the ash pit of the furnace, a'damperhingedly connected to said extended end, a rod slidably and frictionallyengaged in the outer Wall ofthe furnace, a link pivotally connectingsaiddamper and rod, and a handle formed upon the outer end of the rod;said rod being held in its adjusted position by its frictionalengagement with the furnace Wall. r

In testimony whereof- I afiix my signature,

in the presence of two Witnesses V ROBERT L. DENNISQN. Witnesses: -f vMrs. WILLARD HUGHES F. B. KIRBY.

Copies of this patent may be obtained for five cents each, byaddressingthe Commissioner of Patents;

Washington, D. C. I

